Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 344 PM EDT Tue Jul 25 2017 Valid 00Z Wed Jul 26 2017 - 00Z Fri Jul 28 2017 ...Severe weather and flash flooding possible for the Northern Plains/Midwest through Wednesday and Mid-Atlantic/Ohio Valley Thursday... ...Localized flooding will be a concern for the Southwest and southern and central Rockies for the next few days... Much of the Northern Plains, Midwest and Great Lakes region will be in a fairly active wet pattern over the next few days as a frontal system slowly tracks eastward. Scattered to widespread showers and thunderstorms will develop along and ahead of the frontal boundaries, resulting in periods of heavier rainfall and possibly severe weather. The localized areas with higher rainfall may have an increased risk for flash flooding. The areas of showers and thunderstorms will shift south and east by Thursday afternoon into Friday, encompassing much of the Great Lakes, Ohio Valley and the northern Mid-Atlantic. Widespread showers and thunderstorms are expected to continue across the Southwest and Rockies. Locally heavy rainfall may lead to flash flooding from the Central Rockies to parts of the Great Basin through early Wednesday morning. The activity should begin to shift to the north and east as the upper level pattern lifts toward the Northern Plains. The threat for flash flooding will be more focused over the Central and Southern Rockies through Friday morning. Hot and muggy conditions will persist across a vast portion of the central U.S. over the next couple of days. Several locations will have afternoon highs in the 90s to near 100 degree. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php